Submission #412228

#	Time	Username	Problem	Language	Result	Execution time	Memory
412228		nxteru	Martian DNA (IOI16_dna)	C++14	100 / 100	13 ms	408 KiB

dna

#include "dna.h"
#include <bits/stdc++.h>
using namespace std;

string analyse(int n, int t) {
    string ans;
    bool st=false;
    int m=t-(n-ans.size());
    while(n-ans.size()>=m-1){
        if((m-2)*(m-1)/2>=n-ans.size()){
            st=true;
            break;
        }
        m--;
        string p;
        for(int i=0;i<m-1;i++)p+='0';
        if(!make_test(p))break;
        else{
            m+=(p.size()-ans.size());
            ans=p;
        }
    }
    string y;
    if(st)m--;
    while(ans.size()<n){
        if(y.size()==m-1){
            if(st){
                if(make_test(ans+y)){
                    m--;
                    ans+=y;
                    y="";
                    continue;
                }
            }
            for(int i=0;i<m-2;i++){
                if(!make_test(ans+'0'))break;
                ans+='0';
            }
            break;
        }else{
            if(make_test(ans+y+'1')){
                ans=ans+y+'1';
                y="";
            }else y+='0';
        }
    }
    while(ans.size()<n){
        if(make_test('1'+ans))ans='1'+ans;
        else ans='0'+ans;
    }
    return ans;
}                       

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:9:23: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    9 |     while(n-ans.size()>=m-1){
      |           ~~~~~~~~~~~~^~~~~
dna.cpp:10:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         if((m-2)*(m-1)/2>=n-ans.size()){
      |            ~~~~~~~~~~~~~^~~~~~~~~~~~~~
dna.cpp:25:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     while(ans.size()<n){
      |           ~~~~~~~~~~^~
dna.cpp:26:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   26 |         if(y.size()==m-1){
      |            ~~~~~~~~^~~~~
dna.cpp:47:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |     while(ans.size()<n){
      |           ~~~~~~~~~~^~
grader.cpp: In function 'bool make_test(std::string)':
grader.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
grader.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for (int i = 1; i <= ss.size(); i++) {
      |                  ~~^~~~~~~~~~~~
grader.cpp:28:13: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   if (pr[i] == p.size()) {

• Subtask 1: 11 / 11
• Subtask 2: 25 / 25
• Subtask 3: 64 / 64